Improvement in steam-enginery for surface-condensers



WILLIAM A. LIGHTHALL, 4OI" NEW YORK, N'. Y,

Letters Patent No. 89,156, dated Apr/il 20 16 IMPROVEMENT INSTEAM-ENGINERY FOR SURFACE-CONDNSERS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom 'it may concern.'

Be it known that I,WILLIAM A. LIGHTHALL, of the city, county, and Stateof New York, have invented certain new and useful Improvementsrelating-to Surface-,Condensers for Steam-Engines; and I do herebydeclare that the following is a full and perfect descrip'- tion of thesame, reference `being had to the accompanying drawings, and to theletters of reference marked thereon, in which- Figure 1 is a plan view,and

Figure 2, a side elevation.

It is found; in practice, that the circulating-pump, to furnishcooling-water to the surface-condenser of a steam-engine, should,primarily, be independent of the movement of the engine to which thesurface-condenser is attached, so that it can operate when the mainengine is not in motion. p v

It is also found in practice, that the air-pump ordinarily used, isgreatly increased in capacity beyond the absolute requirement.

It is also found in practice that these objects can be Y gained bya muchless loss of power, which constitutes the purpose and effect of myinvention.

I eifect these purposes by the use of an independent driving-engine,which operates, both the circulatingpump, to furnish cooling-wator tothe surface-condenser, and also -the air-pump, to take from thecondenser the incondensible vapor that cannot be condensed in thesurface-condenser.

It is, therefore, nearly automatic in its operation, as the greater thepressure of steam, so is, relatively, the greater number of revolutionsof the pump for coolingwater, and of the air-pump for removing from thecondenser the incondensible vapor. p

Referring to the drawings hereto attached,

A is an independent engine, which drives both` the circulating-pump andthe air-pump. It is so connected with the condenser, that it is almostentirely operated by reason of the vacuum in the condenser, avoiding,thereby, the use of much less live steam to operate it than thatheretofore necessar Tg is the circulating-pump, to furnish the supply ofcooling-water to the surface-condenser, through the proper pipes andattachments.

O is the air-pump, which is attached to and driven by the shaft of theengineA, to effect its purpose named.

The surface-condenser, to which I intend to attach this arrangement, isnot shown in the drawings, but it will be apparent that the combinationand arrangement will fully answer for any condenser of the surface-classnow made and used.

I know that the combination ofthe driving-engine, circulating-pump, andair-pump, has been heretofore used; but in all such cases -they havebeen driven together by the main engine. I therefore disclaim sucharrangement, and only claim the arrangement of the independent engine,with the other devices pertaining thereto, the benefit of which will beapparent to practical engineers.

What I claim as my invention, and desire to secure by Letters Patent,is- I The arrangement of the driving-engine A, circulating-pump B, andair-pump C, when all co-operate together, to perform thefnnctions hereinset forth.

WM. A. LIGHTHALL. Witnesses:

FRANCIS S. Law, J oHN A. LIGHTHALL.

